查询词典 coupled pulse

SERID has following features:(1) The laser pulse is characterized by the vector potential A that is coupled to the Hamiltonian through the time-dependent Peierls substitution.

该方法有以下主要特点：(1)在电子Hamiltonian中通过时间有关的Peierls替代引入了辐射场与分子的相互作用。

TV-F Composite video signal vertical sync pulse are selected out and coupled to the trigger circuit.

可将复杂之影像信号的垂直同步脉冲信号分离出来，并与TRIGGER电路结合。

A novel approach for isolated digit speech recognition based on simplified pulse coupled neural network is presented in terms of the visible characteristics of speech.

根据语音信号的"可视"特点，提出了一种基于简化脉冲耦合神经网络实现孤立词语音识别的方法。

In this dissertation, InGaAs/InGaAsP/InP MQW microdisk laser and its characterization were presented. Some conclusions are as following: the characteristics of lasing threshold was discussed by using rate equation. The dependent relations between threshold and cavity volume, spontaneous emission coupling efficiency β were investigated. The whispering gallery mode and spontaneous emission in a microdisk geometry were then studied. Almost all spontaneous emission was coupled into the lowest order TE mode when the normalized thickness of photonics well was between 0.15 and 0.5. The design principle and device process of InGaAs/InGaAsP/InP MQW microdisk laser were presented. The microdisk lasers with the diameter of 8μm, 4. 5μm and 2μm were succesfully fabricated by using etching techniques. The pulse lasing thresholds for the microdisk with the diameter of 8μm and 4. 5μm were 170μW and 15μW, a record results compared with the published in the literature. The cw lasing threshold for a 2-μm-diameter microdisk was only a few μW. We haven't found similar report up to now. To solve the problem of directional output in a microdisk laser, the power coupling efficiency in a double disk geometry was investigated with the theory of waveguide mode couple. A new structure of electrically pumped microdisk laser with output waveguide was designed, making a foundation for the practical use of microdisk laser.

本文主要研究InGaAs/InGaAsP/InP多量子阱半导体碟型激光器的研制和特性表征，并取得如下结果：利用速率方程理论讨论了激光器激射阈值的特性，分析了阈值与腔体积和自发发射耦合系数β之间的关系；讨论了微碟光子阱结构中的自发发射特性和微碟中WGM模式特性；光子阱结构在其归一化厚度在0.15-0.5之间时，几乎全部自发发射进入到最低阶TE模式中；研究了InGaAs/InGaAsP/InP多量子阱微碟激光器的结构设计原理和器件的制备工艺；利用刻蚀方法成功制备出直径分别为8μm、4.5μm、2μm的碟型微腔激光器；直径8μm和4.5μm的微碟脉冲光泵浦激射阈值分别为170μW、15μW，是目前所见文献报导中比较低的；直径2μm的微碟连续光泵浦激射阈值仅几μW，目前尚未见到达到类似结果的研究报导；为解决微碟激光器激射光定向引出的问题，通过波导耦合模理论分析了双层碟之间功率耦合效率；据此设计了新型带耦合输出波导的电泵浦微腔激光器，为进一步研制可实用的电泵浦微腔激光器打下基础。

Based on coupled nonlinear Schr?dingar equation, the numerical solutions of pulse propagation in fibers were obtained with Split-step Fourier Method.

本文以耦合非线性薛定谔方程为理论模型，采用分步傅立叶方法进行数值计算，仿真研究了满足特定要求的多程放大系统前端脉冲经光纤传输后引起失真的原因。

A DS-3P valve controls the hydraulic motor. A multiturn absolute pulse generator is mounted on top of one spindle, and directly coupled to it to prevent any possible backlash in the gears.

DS-3P 阀门控制水力马达。multiturn 绝对脉冲发生器登上在一个纺锤顶部，和直接地被结合对它防止任一可能的后退在齿轮。

Rapid advances in a number of critical areas coupled with the development of integrated optical devices and sub-picosecond pulse generators make the future of monomode fiber optic communication system look increasingly bright.

近年来对几种重要器件的研究有了新的突破，特别是集成光导器件和次微微秒脉冲发生器的研制成功，使单模光纤通信有了极美好的前景。

The quasi-continuous laser pulse output was realized in the experiment by directly pumping the crystal from its end by the fiber coupled laser diode.

实验中用光纤耦合的激光二极管端面泵浦激光晶体，实现准连续的激光脉冲输出。

We will see more and more activist government policies that distinguish economic activities according to the nationality of the actors.

我们将看到越来越多激进的政府政策，这些政策根据企业的国籍来区分经济活动。

If we can prove the independence of an axiomatic system, then we can guarantee the conciseness of this system, ie.

如果能够证明某个一阶谓词系统的独立性，那么就能够保证该系统的建立是精炼的，即没有任何一条公理或推理规则是多余的。